@article{Hasan:209717,
      recid = {209717},
      author = {Hasan, M.N. and Rahman, M.S. and Hosen, M.F. and Bashar,  M.A.},
      title = {Effects of addition of tilapia on the abundance of  periphyton in freshwater prawn culture ponds with  periphyton substrates},
      journal = {Journal of the Bangladesh Agricultural University},
      address = {2012},
      number = {452-2016-35656},
      pages = {12},
      year = {2012},
      abstract = {An experiment was conducted to evaluate the effect of  addition of tilapia on abundance of periphyton in  freshwater
prawn, Macrobrachium rosenbergii (de Man) in  periphyton based culture system for a period of 120 days at  Fisheries
Field Laboratory Complex, Bangladesh Agricultural  University, Mymensingh. A large pond (83×8.9 m) was  drained
completely and partitioned by galvanized iron sheet  into 18 small ponds of 40 m2
 each; of which 6 ponds were  used
for this experiment. The experimental ponds were  divided into 2 treatments each with 3 randomly selected  ponds.
The absence and presence (0 and 0.5 individual m-2)  of tilapia (Oreochromis niloticus) were investigated in 40  m2
ponds stocked with 3 prawn juveniles (5±0.05 g) m-2 with  added substrates for periphyton development. A  locally
formulated and prepared feed containing 30% protein  was supplied considering the body weight of prawn  only.
Addition of periphyton substrates significantly  reduced the inorganic N-compounds (TAN, NO2-N, and NO3-N)  in
water column. Forty six genera of periphyton were  identified belonging to the Bacillariophyceae (10),  Chlorophyceae
(21), Cyanophyceae (7), Euglenophyceae (2),  Crustacea (1) and Rotifera (5) with significant difference  (P<0.05) of
phyto-periphyton except Euglenophyceae and  without significant difference (P>0.05) of zoo-periphyton  between the
treatments. The abundance of periphyton biomass  in terms of dry matter, ash, ash free dry matter and  chlorophyll-a
were significantly higher in tilapia-free  ponds comparing to tilapia added ponds. Benthic organisms  had no significant
difference (p>0.05) between the  treatments. Addition of tilapia in periphyton-based system  benefited the freshwater
prawn culture through (i) reducing  toxic inorganic nitrogenous compounds in water (ii)  reducing demand for
supplemental feed (iii) using  periphyton as additional natural feed and, (iv)improving  survival and production of prawn
and tilapia.},
      url = {http://ageconsearch.umn.edu/record/209717},
      doi = {https://doi.org/10.22004/ag.econ.209717},
}